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IBM ThinkPad T21 User Guide
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Whenever
the
internal
serial
devices—the
modem,
the
serial
port,
and
the
infrared
port—are
not
in
use,
stop
the
supply
of
power
to
them.
If
you
will
not
be
using
the
computer
for
a
long
period,
remove
the
battery
pack
and
keep
it
in
a
cool
place.
Handling
the
ThinkPad
computer
xv
14
16
Table of Contents
Contents
3
Safety Instructions
5
Handling the Computer
11
Don'ts
11
Do's
13
Cleaning the Computer
13
Carrying Your Computer
14
Extending the Life of Your Computer's Battery
14
System Overview
17
Features
18
Diskette Drive
19
External Interface
20
Specifications
21
Using Your Online User's Guide
23
Starting BIOS Setup Utility
24
Protecting Your Computer
27
Using Passwords
28
Power-On Password
28
Screen Saver Password
28
Hard-Disk Passwords
29
Windows Passwords
29
Supervisor Password
30
Network Password
30
Passwords and Standby Mode
30
Using the Locks and the Security Screw
31
Attaching the Mechanical Lock
31
Using the Asset RF ID Feature
32
Solving Computer Problems
33
Hardware Troubleshooting
34
Error Codes or Messages
34
No Error Codes or Message
38
Power Switch Problem
38
Input Problems
39
Standby or Hibernation Problems
41
LCD Problems
44
Battery Problems
46
Hard-Disk-Drive Problems
47
Software Problems
48
Other Problems
50
Backing up Your System
51
Testing Your Computer
51
Backing up Your System Configuration
51
Backing up Your Data
52
Recovering Lost or Damaged Software
53
Using the Software Selections CD
54
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IBM ThinkPad T21 Specifications
General
Brand
IBM
Model
ThinkPad T21
Category
Laptop
Language
English
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